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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
125 lines
2.5 KiB
C
125 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries
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*
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* Author: Claudiu Beznea <claudiu.beznea@microchip.com>
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*/
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#include <common.h>
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#include <cpu.h>
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#include <dm.h>
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#include <div64.h>
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#include <linux/clk-provider.h>
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struct at91_cpu_plat {
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const char *name;
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ulong cpufreq_mhz;
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ulong mckfreq_mhz;
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ulong xtalfreq_mhz;
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};
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extern char *get_cpu_name(void);
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const char *at91_cpu_get_name(void)
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{
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return get_cpu_name();
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}
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int at91_cpu_get_desc(const struct udevice *dev, char *buf, int size)
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{
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struct at91_cpu_plat *plat = dev_get_plat(dev);
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snprintf(buf, size, "%s\n"
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"Crystal frequency: %8lu MHz\n"
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"CPU clock : %8lu MHz\n"
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"Master clock : %8lu MHz\n",
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plat->name, plat->xtalfreq_mhz, plat->cpufreq_mhz,
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plat->mckfreq_mhz);
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return 0;
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}
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static int at91_cpu_get_info(const struct udevice *dev, struct cpu_info *info)
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{
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struct at91_cpu_plat *plat = dev_get_plat(dev);
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info->cpu_freq = plat->cpufreq_mhz * 1000000;
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info->features = BIT(CPU_FEAT_L1_CACHE);
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return 0;
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}
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static int at91_cpu_get_count(const struct udevice *dev)
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{
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return 1;
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}
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static int at91_cpu_get_vendor(const struct udevice *dev, char *buf, int size)
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{
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snprintf(buf, size, "Microchip Technology Inc.");
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return 0;
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}
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static const struct cpu_ops at91_cpu_ops = {
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.get_desc = at91_cpu_get_desc,
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.get_info = at91_cpu_get_info,
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.get_count = at91_cpu_get_count,
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.get_vendor = at91_cpu_get_vendor,
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};
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static const struct udevice_id at91_cpu_ids[] = {
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{ .compatible = "arm,cortex-a7" },
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{ .compatible = "arm,arm926ej-s" },
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{ /* Sentinel. */ }
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};
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static int at91_cpu_probe(struct udevice *dev)
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{
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struct at91_cpu_plat *plat = dev_get_plat(dev);
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struct clk clk;
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ulong rate;
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int ret;
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ret = clk_get_by_index(dev, 0, &clk);
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if (ret)
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return ret;
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rate = clk_get_rate(&clk);
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if (!rate)
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return -ENOTSUPP;
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plat->cpufreq_mhz = DIV_ROUND_CLOSEST_ULL(rate, 1000000);
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ret = clk_get_by_index(dev, 1, &clk);
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if (ret)
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return ret;
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rate = clk_get_rate(&clk);
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if (!rate)
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return -ENOTSUPP;
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plat->mckfreq_mhz = DIV_ROUND_CLOSEST_ULL(rate, 1000000);
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ret = clk_get_by_index(dev, 2, &clk);
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if (ret)
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return ret;
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rate = clk_get_rate(&clk);
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if (!rate)
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return -ENOTSUPP;
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plat->xtalfreq_mhz = DIV_ROUND_CLOSEST_ULL(rate, 1000000);
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plat->name = get_cpu_name();
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return 0;
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}
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U_BOOT_DRIVER(cpu_at91_drv) = {
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.name = "at91-cpu",
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.id = UCLASS_CPU,
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.of_match = at91_cpu_ids,
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.ops = &at91_cpu_ops,
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.probe = at91_cpu_probe,
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.plat_auto = sizeof(struct at91_cpu_plat),
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.flags = DM_FLAG_PRE_RELOC,
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};
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